#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
char my_strcat(char *des, const char *str)
{
	assert(des && str);
	char* re = *des;
	while(*des)
	{
		des++;
	}
	while (*des++ = *str++)
	{
		;
	}
	return re;
}
int main()
{
	char arr1[50] = { "Are you like china?\n" };
	char arr2[] = { "I like china" };
	my_strcat(arr1, arr2);
	printf("%s", arr1);
		return 0;
}